Note J - Preferred Stock and Warrants (Details Textual) - $ / shares		4 Months Ended	12 Months Ended
	Oct. 05, 2018	Dec. 31, 2019	Dec. 31, 2019	Sep. 03, 2019	Dec. 31, 2018
Preferred Stock, Shares Authorized		10,000,000	10,000,000
Convertible Preferred Stock, Conversion Restriction, Percentage of Common Stock				4.985%
Series B-1 Preferred Convertible Stock Converted to Common Stock [Member]
Conversion of Stock, Shares Converted		1,576	1,576
Conversion of Stock, Shares Issued		1,659,966	1,659,996
Series A Preferred Stock [Member]
Preferred Stock, Shares Authorized		9,578	9,578
Preferred Stock, Shares Issued, Total		9,577	9,577		9,577
Preferred Stock, Shares Outstanding, Ending Balance		0	0		3,337
Preferred Stock, Aggregate Stated Value Per Share	$ 1,000
Convertible Preferred Stock, Conversion Price	$ 3
Conversion Of Stock Shares Issuable If Converted	3,192,333
Series B-1 Convertible Preferred Stock [Member]
Preferred Stock, Shares Authorized		1,576	1,576		0
Preferred Stock, Shares Issued, Total		1,576	1,576		0
Preferred Stock, Shares Outstanding, Ending Balance		0	0		0
Preferred Stock, Aggregate Stated Value Per Share				$ 1,000
Convertible Preferred Stock, Conversion Price				$ 0.9494
Conversion Of Stock Shares Issuable If Converted				1,659,996
Convertible Preferred Stock, Conversion Restriction, Percentage of Common Stock				4.985%
Preferred Stock, Liquidation Preference Per Share				$ 0.0001
Series B-2 Convertible Preferred Stock [Member]
Preferred Stock, Shares Authorized		27,000	27,000		0
Preferred Stock, Shares Issued, Total		0	0		0
Preferred Stock, Shares Outstanding, Ending Balance		0	0		0
Preferred Stock, Aggregate Stated Value Per Share				1,000
Convertible Preferred Stock, Conversion Price				$ 0.9494
Conversion Of Stock Shares Issuable If Converted				28,439,015
Preferred Class A [Member]
Debt Conversion, Converted Instrument, Shares Issued	9,577
Preferred Stock, Aggregate Stated Value Per Share	$ 1,000